Got A Question?
Answers to hundreds of
your common health questions
Not able to find what you are looking for? Send an enquiry to our Health Information Advisors.
nhs24.com provides comprehensive up-to-date health information and self care advice for people in Scotland.
After infection, it can take less than 2 days for symptoms to appear. This is the point when people are most infectious.
Usually 1 person will pass the virus onto 2 other people. Flu spreads quickly in closed communities like schools and residential homes.